I looked on my motor( 327 Chevy) could not see a condensir or anything on wire to Dis. I have messed with a lot of small blocks and I did see one somewhere on one of the cars I,ve had. But not on my 1968 or 1967 pick-up truck. The cars I,ve had with a small block are this and it had to be on one of them. 1955 Chevy 265, 1955 ford 272, 1957 chevy 265 or 283, 1957 ford 292, 1959 ford 352, 1964 chevlle 283, two 1966 chevlles 283, 1968 chevlle 396, 1968 chellve 307, 1971 chellve 350, 1968 C-10 230, 1967 C-10 283, 1968 C-10 327 1968 C-10 350 ?, And a few more I,ve forgoten about. Most ofcourse with points. But only remember a condensir on one of them maybe the 50,s models. Never new about the 12 volt issue. Thanks for advising me. John.